package com.changgou.file.controller;

import com.changgou.entity.Result;
import com.changgou.entity.StatusCode;
import com.changgou.file.util.FastDFSClient;
import com.changgou.file.util.FastDFSFile;
import org.apache.commons.lang.StringUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;

@RestController
@RequestMapping("/file")
public class FileController {
    @PostMapping("/upload")
    public Result uploadFile(MultipartFile file)  {
        try {
        //1.判断文件是否存在
        if (file == null){
            throw new RuntimeException("文件不存在");
        }
        //2.获取文件的完整名称
        String originalFilename = file.getOriginalFilename();
        if (StringUtils.isEmpty(originalFilename)){
            throw new RuntimeException("文件不存在");
        }
        //3.获取文件的扩展名称 abc.jpg         jpg(不能带".")
        String ext = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);
        //4. 获取文件内容
        byte[] bytes = file.getBytes();
        //5.创建文件上传的封装实体类
        FastDFSFile file1 = new FastDFSFile(originalFilename, bytes, ext);
        //6.基于工具类进行文件上传,并接受返回参数  String[]
        String[] uploadResult = FastDFSClient.upload(file1);
        //7.封装返回结果
        String url = FastDFSClient.getTrackerUrl() + uploadResult[0] + "/" + uploadResult[1];
        return new Result(true, StatusCode.OK,"文件上传成功",url);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new Result(false, StatusCode.ERROR,"文件上传失败");
    }
}
